Rocks

Rocks

1. Igneous

   • Intrusive
     • Dolerite or Diabase
       • Location
         • Small dikes and sills in Asia and Europe
       • Uses
         • Decoration or building stone.
         • It was used by many chinese and celt tribes to build monuments
       • How are they formed?
         • masses of fresh diabase enveloped by shells inside a volcano
     • form by the crystallization of magma at a depth within the Earth are called intrusive rocks.
   • :Igneous rocks are formed by the solidification of magma

2. Sedimentary

   • Selenite
     • Uses
       • Meditation and Decoration, it is also medicine
       • Historical Uses
         • It was used by kings in europe to represent power and wealth
     • Location
       • Chihuahua State, Japan, Europe, Mexico, USA, Argentina and Australia
       • near oceans and seas and along fault zones
     • How are they formed?
       • bodies of water evaporate leaving chemicals , then they get compressed together and form selenite.
   • they are formed by sediments , usually at the bottom of the rivers or oceans

3. Metamorphic

   • Phyllite
     • Location
       • Metasediments of northwest Arran, close to Scotland
     • Uses
       • It´s used as construccion material and decoration
     • How are they formed?
       • Heat and Pressure changes Shale into Phyllite
   • They formed from other rocks that are changed because of heat or pressure.

4. An aggregate of mineral matter constituting a part of the earth's crust.

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